Not built, but I bought the Deere V-plow for our HPX. It was pricy, but I'm at the tail end of a 3 year house renovation project and couldn't fab something up without getting yelled at by the missuss. (and when momma ain't happy, no one's happy!).
You can read a bit more about it down in the UTV section. This summer I plan to convert it to power angling, so if you'd like to know any particulars on how Deere does this one, go ahead and ask.